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Citellus ridgwayi Gazin 1932 (ground squirrel)

Mammalia - Glires - Sciuridae

PaleoDB taxon number: 45155

Full reference: C. L. Gazin. 1932. A Miocene Mammalian Fauna From South-Eastern Oregon. Carnegie Institution of Washington Publication 418(3):37-86

Belongs to Citellus according to M. D. Bryant 1945

Sister taxa: Spermophilus armatus, Spermophilus beecheyi, Spermophilus boothi, Spermophilus cochisei, Spermophilus columbianus, Spermophilus cragini, Spermophilus cyanocittus, Spermophilus dotti, Spermophilus elegans, Spermophilus finlayensis, Spermophilus franklinii, Spermophilus fricki, Spermophilus howelli, Spermophilus jerae, Spermophilus johnstoni, Spermophilus lateralis, Spermophilus lorisrusselli, Spermophilus matachicensis, Spermophilus matthewi, Spermophilus mcgheei, Spermophilus mckayensis, Spermophilus meadensis, Spermophilus meltoni, Spermophilus mexicanus, Spermophilus parryii, Spermophilus primitivus, Spermophilus rexroadensis, Spermophilus richardsonii, Spermophilus russelli, Spermophilus shotwelli, Spermophilus spilosoma, Spermophilus superciliosus, Spermophilus taylori, Spermophilus townsendii, Spermophilus tridecemlineatus, Spermophilus tuitus, Spermophilus variegatus, Spermophilus wellingtonensis, Spermophilus wilsoni, Citellus (Otospermophilus) gidleyi, Citellus (Otospermophilus) argonautus, Citellus (Otospermophilus) bensoni

Type specimen: CIT 334, a partial skull (The facial region of the skull, including most of the right zygomatic arch and all of the teeth except the right P3; the incisors are broken at the alveoli). Its type locality is Skull Spring, which is in a Barstovian terrestrial volcaniclastic in the Butte Creek Formation of Oregon.

Ecology: scansorial insectivore

Average measurements (in mm): M1 1.85 x 2.35, M2 2.00 x 2.40, M3 2.20 x 2.10